<!DOCTYPE html>
<html>
<head>
	<title></title>
	<style type="text/css">
		.centerClass {
			text-align: center;
		}
	</style>
</head>
<body>
	<h1 class="centerClass">标题</h1>
	<p  class="centerClass">内容</p>
</body>
</html>